Advantech WebAccess webvrpcs Service BwOpcSvc.dll WindowName sprintf Stack-Based Buffer Overflow Remote Code Execution Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on vulnerable instances of Advantech WebAccess. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the implementation of the 0x13895 IOCTL in the BwOpcTool subsystem. A stack-based buffer overflow vulnerability exists in a call to sprintf with the WindowName parameter. An attacker can use this vulnerability to execute arbitrary code in the context of an administrator of the system.
Additional Details
Advantech has issued an update to correct this vulnerability. More details can be found at:
https://ics-cert.us-cert.gov/advisories/ICSA-16-014-01
Disclosure Timeline
- 2015-09-16 - Vulnerability reported to vendor
- 2016-02-05 - Coordinated public release of advisory
Credit
Anonymous
